METHOD FOR PRODUCING CELLULOSE NANOFIBERS

WIPO Patent Application WO/2011/118746

A1

Provided is a method for producing a highly concentrated cellulose nanofiber dispersion liquid with outstanding fluidity and transparency, with low energy and high efficiency. Specifically, in the presence of (1) an N-oxyl compound and (2) bromides, iodides, or a mixture thereof, a cellulose starting material is oxidized in water using an oxidizing agent to prepare an oxidized cellulose starting material, and in the presence of cellulase and/or hemicellulase, an ultra-high pressure homogenizer is used to perform defibration/dispersion at a pressure of at least 100 MPa.

KATSUKAWA, Shiho (Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
勝川　志穂 (〒02 東京都北区王子５丁目２１番１号　日本製紙株式会社　総合研究所内 Tokyo, 〒1140002, JP)
MIYAWAKI, Shoichi (Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
宮脇　正一 (〒02 東京都北区王子５丁目２１番１号　日本製紙株式会社　総合研究所内 Tokyo, 〒1140002, JP)

JP2011/057283

September 29, 2011

March 25, 2011

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NIPPON PAPER INDUSTRIES CO., LTD. (4-1 Oji 1-chome, Kita-ku Tokyo, 02, 〒1140002, JP)
日本製紙株式会社 (〒02 東京都北区王子１丁目４番１号 Tokyo, 〒1140002, JP)
KATSUKAWA, Shiho (Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)
勝川　志穂 (〒02 東京都北区王子５丁目２１番１号　日本製紙株式会社　総合研究所内 Tokyo, 〒1140002, JP)
MIYAWAKI, Shoichi (Research Laboratory, 21-1, Oji 5-chome, Kita-k, Tokyo 02, 〒1140002, JP)

D01F2/00; C08B15/02; D21H11/18; D21H11/20

ONO, Shinjiro et al. (YUASA AND HARA, Section 206 New Ohtemachi Bldg., 2-1, Ohtemachi 2-chome, Chiyoda-k, Tokyo 04, 〒1000004, JP)

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